The expansion of a 3x3 determinant can be remembered by this device. Write a second copy of the first two columns to the right of the matrix, and compute the determinant by multiplying entries on six diagonals. Add the downward diagonal products and subtract the upward products. Use this method to compute the following determinant. 3 -2 -1 -3 5 3 -1 4 3-2-1 5 1 -3 -1 3] = 4 *** a11 12 13 11 12 a21 22 23 21 22 a31 232 233 231 232

The expansion of a 3x3 determinant can be remembered by this device. Write a second copy of the first two columns to the right of the matrix, and compute the determinant by multiplying entries on six diagonals. Add the downward diagonal products and subtract the upward products. Use this method to compute the following determinant. 3 -2 -1 -3 5 3 -1 4 3-2-1 5 1 -3 -1 3] = 4 *** a11 12 13 11 12 a21 22 23 21 22 a31 232 233 231 232

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter9: Systems Of Equations And Inequalities

Section9.8: Determinants

Problem 29E

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Similar questions

Evaluate the determinant |322214103| , by expanding by minors along the first row.
Explain how to decide which row or column you will use to expand a 33 determinant.
Use a determinant to find the area of the triangle with vertices (2,2), (8,2) and (6,5)

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